Refdesk's 2015 goal is to raise $50,000. Year-to-date total: $7,125 or 14% of the goal, with $42,875 (86%) remaining. Refdesk is a free service, but it is not without cost. Thank you. Contribute HERE >> Feedback HERE >> .

"The Occupational Outlook Handbook is the government's premier source of career guidance featuring hundreds of occupations - such as carpenters, teachers, and veterinarians. Revised every 2 years, the latest version contains employment projections for the 2010-20 decade."
----------------------

Most Roman aqueducts were over 55 feet high. Their great height not only controlled the flow of water but also made it more difficult for someone to steal water and for enemies to put poison in it. The Roman Aqueduct of Segovia was built of stones with no mortar and is still used to carry water today. - Provided by RandomHistory.com----------------------